Challenge 150 - Harshad Numbers

challenge_150.md

Challenge 150 - Harshad Numbers

A number is a Harshad (also called Niven) number if it is divisible by the sum of its digits. For example, 666 is divisible by 6 + 6 + 6, so it is a Harshad number.

Write a function to determine whether the given number is a Harshad number.

Examples

is_harshad(209) ➞ True

is_harshad(41) ➞ False

is_harshad(12255) ➞ True

challenge_tests.py

import unittest


def is_harshad(number: int) -> bool:
    return False  # Put your code here!!!


class Test(unittest.TestCase):
    def test_1(self):
        self.assertFalse(is_harshad(0))

    def test_2(self):
        self.assertFalse(is_harshad(15))

    def test_3(self):
        self.assertTrue(is_harshad(990))

    def test_4(self):
        self.assertFalse(is_harshad(461))

    def test_5(self):
        self.assertFalse(is_harshad(297))

    def test_6(self):
        self.assertFalse(is_harshad(345))

    def test_7(self):
        self.assertFalse(is_harshad(529))

    def test_8(self):
        self.assertFalse(is_harshad(839))

    def test_9(self):
        self.assertFalse(is_harshad(281))

    def test_10(self):
        self.assertTrue(is_harshad(252))


if __name__ == "__main__":
    unittest.main()

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